In Doctrine 2, you can perform conditional updates on multiple rows using the QueryBuilder. The basic idea is to build a DQL (Doctrine Query Language) query that updates the entities based on certain conditions.

Here's an example of how you can achieve a conditional update using the QueryBuilder in Doctrine 2:

Assuming you have an entity named Product with the following fields:

php
// Product.php use Doctrine\ORM\Mapping as ORM; /** * @ORM\Entity * @ORM\Table(name="products") */ class Product { // ... /** * @ORM\Column(type="boolean") */ private $isActive; // ... Other fields and methods }

Now, let's say you want to update the isActive field of all products where the price is greater than a certain value. You can use the following code to achieve this:

php
use Doctrine\ORM\EntityManagerInterface; use Doctrine\ORM\Query\Expr; // Get the EntityManager $entityManager = // ... Obtain the EntityManager instance here // Get the QueryBuilder $queryBuilder = $entityManager->createQueryBuilder(); // Build the update query $queryBuilder->update('Product', 'p') ->set('p.isActive', ':isActiveValue') ->where($queryBuilder->expr()->gt('p.price', ':priceValue')) ->setParameter('isActiveValue', true) // Set the new value for isActive ->setParameter('priceValue', 100); // Set the condition for price // Execute the update query $query = $queryBuilder->getQuery(); $updatedRows = $query->execute();

In the above code, we create a QueryBuilder instance for the Product entity and use the update() method to specify the entity name and alias. Then, we use the set() method to set the new value for the isActive field and the where() method with the gt() expression to add the condition for the price. We set the parameters for the condition and the new value using the setParameter() method.

Finally, we execute the update query using the getQuery() and execute() methods of the Query object.

Keep in mind that using the QueryBuilder to perform updates is more suitable for bulk updates and conditional updates. For individual entity updates, you can use the EntityManager and the persist() method to update entities and then flush the changes.

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